Improvement in wrenches



M. BUBSER.

Wrenches.

Patented July 29,1873.

Inventor:

Per

Anorneys.

fir

UNITED STATES PATENT QFFICE.

MICHAEL BUBSER, OF JERSEY CITY, NEW JERSEY.

IMPROVEMENT IN WRENCHES.

Specification forming part of Letters Patent No. 141,259, dated July 29,1873 application filed April 19, 1873.

To all whom it may concern:

Be it known that I, MICHAEL BUBSER, of Jersey City, in the county ofHudson and State of New Jersey, have invented a new and usefulImprovement in Wrench for Fishfish-plate bolts, and other nuts and boltsthat require great power to turn them, and which shall be simple inconstruction and convenient in use. The invention consists in thecombination of the base, the lower bearing, the wrench-shaft, the sidebars, the endless chain, the chain-wheels, the upper bearings, and theextendible crank with each other; in the combination of the upperbearings, constructed as hereinafter described, the setscrews and thelocking-nuts with the side bars and the upper shaft, to enable theendless chain to be conveniently tightened; and in the combination ofthe curved and slotted bar and the rod with the base and the side barsof the machine, as hereinafter fully described.

A represents the base of my improved wrench, which should be made ofsuch a length as to rest upon three ties at the same time, and to themiddle part of which is attached a wide bearing, B, in which the shaft 0revolves and slides. The end parts of the shaft 0 revolve in bearingsattached to the lower ends of side bars D. One of the projecting ends ofthe shaft 0 is enlarged, and in its outer end is formed a square hole ofsufficient size to receive the nut to be operated upon, while the end ofthe bolt projects into a cavity or hole formed in the said projectingend of the shaft 0. To the other projecting end of the shaft 0 isattached a chain-wheel, E, which must be so small that its rim will notcome in contact with the tie or ground. Fis an endless chain, whichpasses around the chain wheel E, and also around the chain-wheel Grattached to the shaft H, which revolves in bearings I attached to theupper ends of the bars D. The lower half of the bearings I is made withlong ends, which nut.

bend downward to overlap the edges of the bars D, and have slots formedin them to receive the screws or bolts by which they are secured to saidedges. J are set-screws which pass through holes in the upper half ofbearings I and through screw-holes in the lower half of said bearings I.The ends of the screws J rest against the ends of the bars D, or insockets formed in said ends, so that by turning said screws J thebearings I may be raised to tighten the endless chain F. K arelocking-nuts placed upon the screws J above the upper half of thebearings I, so that by turning the said nuts K down, the two halves ofthe bearings I will be held close together. To the chain-wheel Grisattached an arm, L, to the outer end of which is attached a bolt, whichpasses through a longitudinal slot in the bar M, and is provided with ahand-nut. The other end of the bar M passes over the projecting end ofthe shaft H, and is secured in place bya Upon the end of the bar M isformed a handle, N, for convenience in operating it. The arm L andslotted bar M N thus form an extendible crank, which may be convenientlyextended "and contracted to give a greater or less leverage as more orless power may be required. 0 is a curved bar, the ends of which areattached to the base A upon the opposite sides of the bearings B. In theupper part of the curved bar 0 is formed a'short slot, curved upon thearc of a circle, having its center in the axis of the shaft 0. Throughthe slot of the bar 0 passes a bar, rod, or round, P, the ends of whichare attached to the side bars D, so that the machine may be inclined inone or the other direction, as may be convenient in operating it eratedto turn the nut in one or the other direction, the movement of the nutupon its bolt will move the machine out or in, the shaft 0 slidinglongitudinally in its bearings B and the rod P sliding in the slot ofthe curved bar 0.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination of the base A, bearings By thisconstruction, as the machine is op- B, wrench-shaft 0, side bars D,endless chain F, chain-Wheels E G, bearings I, and extendible crank L MN with each other, substantially as herein shown and described.

2. The bearings I, formed of two parts, one of which is slotted andsecured to the bars D, the jam-nuts K, and the screws J, in combinationwith the shaft 0 rotating in fixed bearings, the endless chain F, andshaft H, all as shown and described.

3. The combination of the curved and slotted bar 0 and rod P with thebase A and side bars D of the machine, substantially as herein shown anddescribed.

MICHAEL BUBSER.

Witnesses:

JAMES T. GRAHAM, T. B. MosHER.

